Jumpy

I have a muscle in my right shoulder that has been twitching nearly constantly for the last two days. It's a weird sensation, and it's strange to look down and see your blouse jumping around when you know damn well you're not moving your arm. This muscle has not rested, therefore my arm is tired. Really, noticeably tired. I feel like I've been lifting a five-pound weight with my right arm, all night long. Intercessory curling.

Don't you think this calls for a muscle relaxer? I could swear this calls for a muscle relaxer.